How we approach skylight replacement in Penzance
We handle skylight replacement across Cornwall, including Penzance. In short: replacing tired domes and failed glass with a modern rooflight. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Western coasts take wind-driven rain, so we pay close attention to upstand height and flashing laps on exposed roofs. Think of skylight replacement for yellowed domes, misted glass and leaking roof windows.
Neighbouring towns include Camborne (20 km) and Redruth (26 km). We offer a survey date when we reply to your enquiry.
Specification options
- Fixed to electric opening
- Roof window replacement in pitched roofs
- Upstand rebuild and insulation
- Misted glass unit replacement only
- Like-for-like size replacement
- Option to add opening and rain sensor
- Better thermal performance
Before you order: points to check
- Enlarging the opening changes the structure and may need approval
- Upstand and roof condition decide the scope
Planning, building control and Penzance
Most rooflights on English houses do not need planning permission, provided they keep within 150 mm of the roof surface and below the ridge line. A rooflight on a side-facing slope must be obscure-glazed, and fixed shut unless the opening part is more than 1.7 m above the floor.
For English homes the energy rules ask for rooflights of 2.2 W/m²K or better and roof windows of 1.4 W/m²K (or WER Band B); most modern double glazed units meet both. In an extension, glazing including rooflights is normally limited to 25% of the new floor area plus any windows or doors the extension covers, unless a whole-house calculation shows otherwise.
Read the planning permission guide before you commit to a design.
What does skylight replacement cost in Penzance?
Guide prices for skylight replacement in Penzance are the same as anywhere we work — what changes the price is the job: access, structure, scaffold and finishing.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Replacement with upstand rebuild and opening unit | £2,995 – £4,795 | £2,495 – £3,995 |
| Dome to flat glass upgrade Typical | £1,915 – £2,995 | £1,595 – £2,495 |
| Like-for-like glass rooflight | £1,555 – £2,155 | £1,295 – £1,795 |
What happens next
- Send the details. Postcode, rough size and a photo of the roof and room.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Neighbouring towns
Other services in Penzance
Questions about skylight replacement in Penzance
How long does a replacement take?
Usually a day for a standard rooflight on a sound upstand.
Do I need building regulations approval to replace a rooflight?
Replacements in existing homes generally need to meet current thermal standards and may need notification or approval. We advise on the route for your job.
Will it mess up my ceiling?
We protect the room and make good the reveal. Minor decoration may be needed afterwards.
Will I need planning permission in Penzance?
In England a rooflight on a house is usually permitted development under Class C if it projects no more than 150 mm beyond the roof slope and sits no higher than the ridge.
Do you offer skylight replacement in Penzance?
Yes. We carry out skylight replacement in Penzance and across Cornwall. Send your postcode and we will offer a survey date when we reply.
